Smooth and supportive for every step. Dynamic cushioning - Nitrogen-infused DNA LOFT v3 midsole foam delivers soft, smooth cushioning that adapts to your unique stride for lightweight comfort mile after mile. GuideRails holistic support system - Our innovative technology supports your body in its natural motion path while keeping excess movement in check. Enhanced upper - Engineered Air Mesh upper provides just right breathability, stretch, and structure for an accommodating fit.